TL431AIDG4

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Adjustable precision shunt regulator - Programmable output voltage - Low dynamic output impedance - High stability over temperature and time - Wide operating current range - Low output noise - Fast response time

Package: SOIC-8

Essence: The TL431AIDG4 is a versatile voltage reference IC that provides precise and stable output voltage regulation. It is commonly used in various electronic circuits to maintain a constant voltage level.

Packaging/Quantity: The TL431AIDG4 is available in a standard SOIC-8 package. It is typically sold in reels containing 2500 units.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Line Regulation: 0.2% (maximum)
• Load Regulation: 0.4% (maximum)
• Output Noise Voltage: 0.2µVrms (typical)
• Quiescent Current: 1.0mA (typical)

Pin Configuration

The TL431AIDG4 has eight pins arranged as follows:

____ NC | | Vref NC | | Anode NC | | Cathode NC |____| NC

• Vref: Reference Voltage Output
• Anode: Anode Terminal
• Cathode: Cathode Terminal
• NC: No Connection

Functional Features

1. Adjustable Output Voltage: The TL431AIDG4 allows the user to program the desired output voltage by connecting external resistors.
2. Precision Regulation: It provides accurate and stable voltage regulation, ensuring a constant output voltage even with varying input conditions.
3. Low Dynamic Output Impedance: The IC maintains a low dynamic output impedance, enabling it to handle load variations effectively.
4. Wide Operating Current Range: It can operate within a wide current range, making it suitable for various applications.
5. Fast Response Time: The TL431AIDG4 responds quickly to changes in input conditions, providing rapid voltage regulation.

Advantages and Disadvantages

Advantages: - Precise and stable voltage regulation - Adjustable output voltage - Wide operating current range - Low output noise - Fast response time

Disadvantages: - Requires external resistors for voltage programming - Limited temperature range (-40°C to +85°C)

Working Principles

The TL431AIDG4 operates based on the principle of a shunt regulator. It compares the reference voltage (Vref) with the feedback voltage obtained from the voltage divider network connected to the Anode and Cathode terminals. By adjusting the resistance values in the voltage divider, the desired output voltage can be set. The TL431AIDG4 then regulates the current flowing through the Cathode terminal to maintain a constant output voltage.

Detailed Application Field Plans

The TL431AIDG4 finds extensive use in various electronic applications, including:

1. Power Supplies: It is commonly used in power supply circuits to provide precise voltage regulation and stability.
2. Battery Charging Systems: The IC ensures accurate voltage control during battery charging, preventing overcharging or undercharging.
3. Voltage References: It serves as a reliable voltage reference source in analog and digital circuits.
4. Audio Amplifiers: The TL431AIDG4 helps maintain a stable bias voltage in audio amplifier circuits, improving overall performance.
5. LED Lighting: It is used in LED driver circuits to regulate the voltage supplied to LEDs, ensuring consistent brightness.

Detailed and Complete Alternative Models

1. TL431BIDR: Similar to TL431AIDG4 but available in a smaller SOT-23 package.
2. TLV431BQDBZR: A low-voltage version of TL431AIDG4 with a reference voltage range of 0.6V to 6V.
3. LM4040AIM3-2.5/NOPB: A precision shunt voltage reference IC with a fixed output voltage of 2.5V.

These alternative models offer similar functionality and can be used as substitutes for the TL431AIDG4 in various applications.

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